Centrifugal pump.



No. 810,975. A y PATENT'JANBG, 19026. J. H. o. PETERSBN- GENTRIPUGAL PUMP.

APPLICATION FILED NOV. l1, 1904.

MMM

No. 810,975. PATENTED JAN. 30, 1906. J. ELC. PETERSEN.

' GBNTRIPUGAL PUMP. APPLIOATIQN FILED Nov. 11, 1904.

a' umn a UNITED STATES PATENT CEEICE.

JOACHIM HINRICH CHRISTIAN PETERSEN, CF. HAMBURG, GERMANY.

i CENTRE-USAL PUMP.-

- Specification of Letters Patent.

ratentea Jah. so, 1906.

Application filed' November 11, 1904. Serial No.. 232,371.

Toy all whom t may concern: j

Be it known that I, JOACHIM HINRICII in the GermanEmpire, have invented certain new and useful Improvements in Centrifugal Pumps, ofwhich the following is a specification.

The present invention relates to im rovements in centrifugal pumps of that c ass in which the fluid by the rotation of a suctionhead arranged above the top end of a suctionpipe is caused to ascend through' the said suction-pipe into the outlet passage or chamber of the suction-head, whence 1t is driven out- Vwardly or discharged through a pipe or the like dipping into the fluid bulk accumulated in the chamber of the suction-head. In f pumps of this character the connection between the discharge or pressure pipe and the .skimming device must necessarily be uid- I' tight, and for this reason the skimming device'has heretofore been stationary and riglidly mounted Within the suction-head andA rigidly connected with the pressure-pipe. In

order' to remove the suction-head or disassemble the parts of the pump for repairs, it is quite necessary to remove the skimmingl device, and to do this it necessitates disconnecting the skimmer from the pressure-pipe, an operation which obviously is objectionable, tedious, ,and diflicult, owingto the Huid-tight connection.

. The object of this improvement is to overcome these objections by providing a lskimming device adapted to skim off the iiuid as it accumulates in the suction-head and to lead it into the pressure-pipe, and while be-l ing connected fluid-tight with the pressure-v pipe it is also movably connected, so that it can be easily and uickly removed froment of the suction-head1 whenever desirable to repair the latter without in'any way interfering with the pressureipe or destroying its connection with the skimmer; and with that object in view my invention consists in certain novel features of construction and combinations of parts, as will be fully described with reference to the accompanying sheets of drawings, in whichv Figure l is a central vertical section of an improved centrifugal pump embodying'. my invention. Fig. 2 isv-a top viev'fv of the suction-head and the lower part of the fluidbeing at right angles.

skimmin device, partly in section.` Fig. 3 is. a detai ed sectional view showing the movable connection of the skimming device with the pressure-pipe conduit. Fig. 4 is a similar sectional view to Fig. 1, illustrating a modification of the skimming device and its connectionwith the pressure-pipe. Fig. 5 is a top view or plan of-Fig. 4. Fig. 6 is a horizontal section of the skimming device Shown in Fig. 4.

Similar letters refer to similar v parts throughout the several iigures.

Referring to Fig. 1, upon the suction-pipe a is rotatably mounted a'socket b, carrying the armature c and commutator d of a suitable electric motor,` the electroma nets e. of which are fastened to the walls of t e pumpcasing head,which consists of a bell orfunnel shaped body g, having an upright flange g', and of an,v inverted cup h h, screwed into the flange part g. The cup hh has an inner ilange h2, provided vvith a plurality of Huid-passages h3. Into the body g is Inserted a whip-top-like body i, resting with an external flan e i. upon a suitable shoulder inthe interior o the said body\g, the flange e" being provided with a plurality of passages ft2 for the fluid. To the casing fis fixed an annular framev or ring c, surrounding the body g, a lip g2 of which laps over or embraces with sufficient play the upper edge'of the ring k. The latter is furnished 'with an upright arm 7c', serving as a support lor carrier for the pressure or discharge pipe Z, suitably attached to a lug k2 of the said arm 7c. In front of the entrance or mouth of the pipe Z is mounted a lug-like body m, Fig. 3, fitting with its conica part m into a suitable boring n, lined with a suitablyshaped socket o, and being heldin position and in fluid-tight connectionby means of an Upon the socket b is fastened the suctioni adjustable set-screw p, screwed through a threaded hole in the opposite lug k3 and acting a ainst the closed end of the plug m.

4The p ug m fm/ has a nozzle g resting with a lug or stop-piece q upon the upper face of the arm 7c', the bores of the plug and the nozzle l Connected to the nozzle g by means of a bent-down connectingpiece 1' is a'tube s, the lower end s of which is spirally bent'in a plane at ri ht angles lto the axis of the tube s, so as to orm a spiralduct dippin with its free end or mouth into IOO theiiuid b k accumulating in the chamberv or cup h and adapted to skim off this fluid in the manner shown in Fig. 2. 1

The o eration of the pump above described is well lifnown and needs,'therefore, no detailed description. Suffice it to saythat when the electric motor has been started and the pum primed the sucking action of the4 suctionead revolving with a high speed causes the iiuid to ascend or to flow up through the suctionipe. The uid as it flows out at the top of t e latter is at once subjected to the centrifugal action and forced outwardly and upward through the trumpet-shaped passage between the walls of the bodies g and/i and through the passages i2 against the inner wall of the flange h whence it is forced up through the passages ha into the cup or v.chamber h.

The fluid bulk accumulating in the cup h is forced into the skimming-tube s s and de-l livered through the nozzle and plug connection :into the pressure-pipe through which 'it is to be dischargedunder pressure as a continuous jet. As the skimming device s s has a swinging motion by the said conical plugand-socket connection, it may, if desired, be

turned upward in the manner shown by dotted lines in Fig. 1, so as to swing the said skimming device out of the Way and give free access to the suction-head. y

In the modification shown in Figs. 4 to' 6 the spiral part s of the skimming-tube is replaced by a disk t, attached to the tube s and provided 'with spiral ducts u, covered by a -m'ounted on the tube s, so that the cup can ottom plate t', the inner ends of the spiral ducts communicating with the tubes through holes s2, whereas the outer ends ofthe said v4duct's--thatis to' say, the periphery of the skimmin -disk-are dipping into the fluidv bulk. T e tube sv is rigidly connected to or branched off from-the pressure-pipe Z, and 'this latter is rotatably mounted with a pivot v into a standard fw of a latform rw, fastened pppn the pump-casing The inverted cup fied form re resented by i .4byaninverted cup fwhic is rotatably, ut not slidably,

easily be screwed into or unscrewedl from the' flange part g ofthe bodyig. Theoperation so' of this modified pump is exactly the same as that described Awith reference to the pump shown by Fig. 1. For removing the. skimming device s t t u, first the"cu V:c is unscrewed, the skimming device an pressurepipe being simultaneously lifted in the same of the suction-head. Instead of removing aside the arrangement may also be such that the removal of the skimming device can be eected by simply raising. or liftin the latter to 1a sufficient height in a vertica direction on y.

Having fully described my invention, what I claim, and desire to secure by Letters Patent, is-

1. In combination witha centrifugal pump, and its suction-head, a discharge-pipe, and a skimming device communicating with the dischar e-pipe ada ted to be swung into and out of t suctionead.

2. In combination with a centrifugal pump and its suction-head, a supporting e ement, a discharge-pipe supported by said element and a skimming device communicating with the discharge-pipe and adapted to revolve laround the supporting element.

3. Incombination with a centrifugal pump and its suction-head, a standard, a dischargepipe, a conduit lpivotally supported in the standard communicating with the dischargepipe, and a vspiral conduit carried by and 'communicating' with the aforesaid conduit adaptedv to take into the suction-head.

4. In combination with a centrifugal pump and its suction-head, a standard, a dischargepipe, a conduit pivotally supported in the pipe, and a communicating conduit eccentric to the vertical axis of the mouth of the, aforesaid conduit.

5. In combination with a centrifugal pump and its suction-head, a standard, a dischargepipe, a conduit pivotally supported in the.

standard communicating with the dischar epipe, and a conduit communicating with t e standard communicating with thedischarge- IOO aforesaid conduit-opening at the lperiphery of the suction-head. (shown in Fig'. 1) is re lacedin the modi- 6. 4In combinationwith a centrifugal pump and its suctionhead,`.a standard, a dischargeeI mounted therein, a hollow plug rota- P1 tably mounted in the standard communicating with the discharge-pipe, a nozzle carried bythe plu and a spiral conduit carried by the nozzleiaving its mouth terminating at the periphe of the suction-head.

IIO

7. In com inationwith a centrifugal pump and its suction-head, a standard, a dischargepi e mounted therein, a hollow plug rotata ly mounted in the standard and communieating with the discharge-pipe, a nozzle carried by and communicating with the plug, means to limit the rotation o f the plug, a conduit communicating with the nozzle havin a spiral portion opening into the suction-head near its inner eri hery.

8. In combination with a centrifugal pump and its suction-head, a standard, a dischargepipe mounted therein, a hollow plug rotatably mounted in 'a socket formed in the angles to its exis, said spiral portion opening standard and communicating, With the disat the periphery of the suction-head, and Io charge-pipe, means to adjust the plug inthe ,means to ho d the spiral portion inaJ longtusocket, a nozzle enterin the lug at right i dinal plane.

angles to the .mouth of t e disq arge-pi e, a v JOACHIM HINRICH CHRISTIAN PETESEN. condult enterln the nozzle at right ang es to Wltnesses: o the longitudine axis of the nozzle and lhsv- MAX KAEMPFF,

ing a spiral portion bent in e plane at right OTTo 4W. HELLMRIOH. 

